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annotate core/src/luan/modules/BasicLuan.java @ 221:ec016471c6eb

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make LuanTable an interface git-svn-id: https://luan-java.googlecode.com/svn/trunk@222 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 17 Jul 2014 07:49:26 +0000
parents 75750ceb45ee
children ef39bc4d3f70
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
167
4c0131c2b650 merge luan/lib into modules
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diff changeset
1 package luan.modules;
2
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3 import java.io.InputStreamReader;
12
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4 import java.io.IOException;
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5 import java.lang.reflect.Method;
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6 import java.util.Iterator;
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7 import java.util.Map;
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8 import java.util.List;
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9 import java.util.ArrayList;
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10 import luan.Luan;
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11 import luan.LuanState;
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12 import luan.LuanTable;
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13 import luan.LuanFunction;
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14 import luan.LuanJavaFunction;
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15 import luan.LuanException;
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16 import luan.LuanSource;
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17 import luan.LuanElement;
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4eaee12f6c65 move luan/interp to impl
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18 import luan.impl.LuanCompiler;
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21 public final class BasicLuan {
2
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23 public static final LuanFunction LOADER = new LuanFunction() {
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24 @Override public Object call(LuanState luan,Object[] args) {
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25 LuanTable module = Luan.newTable();
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26 try {
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27 module.put( "assert", new LuanJavaFunction(BasicLuan.class.getMethod("assert_",LuanState.class,Object.class,String.class),null) );
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28 add( module, "assert_boolean", LuanState.class, Boolean.TYPE );
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29 add( module, "assert_nil", LuanState.class, Object.class );
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30 add( module, "assert_number", LuanState.class, Number.class );
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31 add( module, "assert_string", LuanState.class, String.class );
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32 add( module, "assert_table", LuanState.class, LuanTable.class );
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33 add( module, "do_file", LuanState.class, String.class );
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34 add( module, "error", LuanState.class, Object.class );
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35 add( module, "get_metatable", LuanState.class, Object.class );
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36 add( module, "ipairs", LuanState.class, LuanTable.class );
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37 add( module, "load", LuanState.class, String.class, String.class, LuanTable.class, Boolean.class );
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38 add( module, "load_file", LuanState.class, String.class );
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39 add( module, "pairs", LuanState.class, LuanTable.class );
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40 add( module, "range", LuanState.class, Double.TYPE, Double.TYPE, Double.class );
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41 add( module, "raw_equal", Object.class, Object.class );
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42 add( module, "raw_get", LuanTable.class, Object.class );
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43 add( module, "raw_len", LuanState.class, Object.class );
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44 add( module, "raw_set", LuanTable.class, Object.class, Object.class );
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45 add( module, "repr", LuanState.class, Object.class );
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46 add( module, "set_metatable", LuanTable.class, LuanTable.class );
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47 add( module, "to_number", Object.class, Integer.class );
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48 add( module, "to_string", LuanState.class, Object.class );
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49 add( module, "type", Object.class );
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50 add( module, "values", new Object[0].getClass() );
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51 } catch(NoSuchMethodException e) {
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52 throw new RuntimeException(e);
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53 }
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54 return module;
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55 }
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56 };
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57
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58 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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59 t.put( method, new LuanJavaFunction(BasicLuan.class.getMethod(method,parameterTypes),null) );
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60 }
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61
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62 public static String type(Object obj) {
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63 return Luan.type(obj);
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64 }
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65
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66 public static LuanFunction load(LuanState luan,String text,String sourceName,LuanTable env,Boolean allowExpr)
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67 throws LuanException
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68 {
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69 if( allowExpr==null )
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70 allowExpr = false;
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71 return LuanCompiler.compile(luan,new LuanSource(sourceName,text),env,allowExpr);
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72 }
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74 public static LuanFunction load_file(LuanState luan,String fileName) throws LuanException {
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75 try {
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76 String src = fileName==null ? Utils.readAll(new InputStreamReader(System.in)) : IoLuan.luanIo(luan,fileName).read_text();
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77 return load(luan,src,fileName,null,false);
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78 } catch(IOException e) {
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79 throw luan.exception(e);
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80 }
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81 }
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82
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83 public static Object do_file(LuanState luan,String fileName) throws LuanException {
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84 LuanFunction fn = load_file(luan,fileName);
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85 return luan.call(fn);
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86 }
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87
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88 public static LuanFunction pairs(LuanState luan,final LuanTable t) throws LuanException {
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89 Utils.checkNotNull(luan,t,"table");
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90 return new LuanFunction() {
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91 Iterator<Map.Entry<Object,Object>> iter = t.iterator();
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92
109
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93 @Override public Object[] call(LuanState luan,Object[] args) {
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94 if( !iter.hasNext() )
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95 return LuanFunction.NOTHING;
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96 Map.Entry<Object,Object> entry = iter.next();
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97 return new Object[]{entry.getKey(),entry.getValue()};
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98 }
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99 };
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100 }
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101
221
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102 public static LuanFunction ipairs(LuanState luan,final LuanTable t) throws LuanException {
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103 Utils.checkNotNull(luan,t,"table");
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104 return new LuanFunction() {
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105 List<Object> list = t.asList();
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106 int i = 0;
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107 final int size = list.size();
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108
221
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109 @Override public Object[] call(LuanState luan,Object[] args) {
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110 if( i >= size )
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111 return LuanFunction.NOTHING;
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112 Object val = list.get(i++);
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113 return new Object[]{i,val};
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114 }
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115 };
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116 }
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117
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118 public static LuanTable get_metatable(LuanState luan,Object obj) {
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119 return luan.getMetatable(obj);
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120 }
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121
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122 public static LuanTable set_metatable(LuanTable table,LuanTable metatable) {
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123 table.setMetatable(metatable);
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124 return table;
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125 }
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126
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127 public static boolean raw_equal(Object v1,Object v2) {
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128 return v1 == v2 || v1 != null && v1.equals(v2);
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129 }
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130
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131 public static Object raw_get(LuanTable table,Object index) {
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132 return table.get(index);
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133 }
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134
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135 public static LuanTable raw_set(LuanTable table,Object index,Object value) {
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136 table.put(index,value);
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137 return table;
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138 }
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139
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140 public static int raw_len(LuanState luan,Object v) throws LuanException {
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141 if( v instanceof String ) {
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142 String s = (String)v;
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143 return s.length();
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144 }
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145 if( v instanceof LuanTable ) {
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146 LuanTable t = (LuanTable)v;
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147 return t.length();
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148 }
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149 throw luan.exception( "bad argument #1 to 'raw_len' (table or string expected)" );
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150 }
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151
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152 public static Number to_number(Object e,Integer base) {
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153 return Luan.toNumber(e,base);
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154 }
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155
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156 public static String to_string(LuanState luan,Object v) throws LuanException {
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157 return luan.toString(v);
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158 }
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159
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160 public static void error(LuanState luan,Object msg) throws LuanException {
130
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161 throw luan.exception(msg);
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162 }
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163
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164 public static Object assert_(LuanState luan,Object v,String msg) throws LuanException {
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165 if( Luan.toBoolean(v) )
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166 return v;
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167 if( msg == null )
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168 msg = "assertion failed!";
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169 throw luan.exception( msg );
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170 }
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171
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172 public static String assert_string(LuanState luan,String v) throws LuanException {
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173 Utils.checkNotNull(luan,v,"string");
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174 return v;
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175 }
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176
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177 public static Number assert_number(LuanState luan,Number v) throws LuanException {
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178 Utils.checkNotNull(luan,v,"number");
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179 return v;
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180 }
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181
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182 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException {
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183 Utils.checkNotNull(luan,v,"table");
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184 return v;
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185 }
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186
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187 public static boolean assert_boolean(LuanState luan,boolean v) throws LuanException {
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188 return v;
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189 }
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190
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191 public static Object assert_nil(LuanState luan,Object v) throws LuanException {
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192 if( v != null )
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193 throw luan.exception("bad argument #1 (nil expected, got "+Luan.type(v)+")");
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194 return v;
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195 }
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196
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197 public static String repr(LuanState luan,Object v) throws LuanException {
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198 return luan.repr(v);
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199 }
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200
109
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201 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException {
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202 final double step = stepV==null ? 1.0 : stepV;
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203 if( step == 0.0 )
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204 throw luan.exception("bad argument #3 (step may not be zero)");
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205 return new LuanFunction() {
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206 double v = from;
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207
112
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208 @Override public Object call(LuanState luan,Object[] args) {
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209 if( step > 0.0 && v > to || step < 0.0 && v < to )
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210 return LuanFunction.NOTHING;
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211 double rtn = v;
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212 v += step;
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213 return rtn;
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214 }
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215 };
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216 }
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217
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218 public static LuanFunction values(final Object... args) throws LuanException {
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219 return new LuanFunction() {
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220 int i = 0;
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221
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222 @Override public Object call(LuanState luan,Object[] unused) {
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223 if( ++i > args.length )
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224 return LuanFunction.NOTHING;
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225 return new Object[]{i,args[i-1]};
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226 }
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227 };
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228 }
143
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229
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230 }